Proof printing-press.



R. O. VANDERCOOK.

PROOF PRINTING PRESS.

APPLICATION FILED SEPT. 9, 1909.

Patunted May 16, 1911.

3 SHEETB-SHEET 1.

R. O. VANDEBIGOOK.

PROOF PRINTING PRESS.

APPLICATION PILED SEPT. 9, 1909.

992,461 Patented May 16, 1911.

3 SHEETS-SHEET 2.

R. 0. VANDERCOOK.

PRooP PRINTING PRESS.

APPLICATION FILED SEPT. 9, 1909.

992,461 Patented May 16, 1911.

3 SHEETS-SHEET 3.

ROBEB T 0. VANDERGOOK, 0F CHICAGO, ILLINOIS.

PBOGF PRINTING-PRESS.

Specication of Letters Patent.

Patented May 16, 1911.

Application led September 9, 1909. Serial No. 516,912.

To all whom 'it may concern:

Be it known that I, ROBERT O. VANDER- cooK, a citizen of the UnitedStates, and a resident of Chicago, in the county of CookV and State ofIllinois, have invented certain new and useful Improvements in ProofPrinting-Presses, (Case A;) and I do hereby declare that the followingis a full, clear, and exact description thereof, reference being had tothe accompanying drawings, and to the lettersv of reference markedthereon, which form a part of this specification.

This invention relates toa novel printing press adapted to take proofimpressions from forms of type, linotypes, electro-types, cuts,engravings or other printable forms used with printing presses, and theinvention consists of the matters hereinafter fully described and morespecifically pointed out in the appended claims.

The invention relates particularly to the type of proof printing pressdescribed in an applicatlon tiled by me on February 8th, 1909 Serial No.476,695, and to a certain novel and improved construction by means ofwhich the impression member, while being properly held down to its Workwhen traveling in a forward direction 'to make the impression, asdescribed in said pr1or application, is lifted upon its return trip soas not to engage the faces of the type or of the proof sheet. Saidimpression member travels back to its initial position in this elevatedplane Where it is again brought into a plane to engage the type and makeproof impression in its forward movement. The press is also rovided withan improved mechanism which prevents any lpossibility of thedisengagement of the segmental gear- 40,teeth from the racks in whichthey travel,

all of which will be more fully described in the followingspecification.

In the draWinUs:-Figure 1 is a vertical, longitudinal section through aproof printing press of the type described, provided with the novelfeatures above referred to with the impression member at the end of itspath after taking an impression. Fig. 2 is a top plan view of the sameshowing the im-l ression member at the middle of its path as 1t istaking an impression. Fig. 3 is a similar sectional view of the bed andof the impression member with the latter in its initial position. Fig.:4 is a similar view showing the impression member when in activeposition making a proof impression. Fig. 5 is a partial vertical sectionthrough Fig. 2 on the line 5-5 thereof. Fig. 6 is a side elevatlon ofthe impression member showing the segmental gears by which it isoperated.

In the drawings, 1 indicates the bed-plate of the machine supported onsuitable legs 2, 2 and provided wlth vertically arranged, parallel sideplates or brackets 3, 3 which are arranged parallel with the path of theimpression-member and supportthe rails which lc)ontrol the operation ofthe impression mem- 1a indicates the type or other form supported on thebed and 1b the proof sheet superposed on the type (see Fig. 5).

4 indicates the impression-member which comprises a segmental, cylindricbody or platen 5 of a length substantially equal to the width of thebed-plate 1, a radially arranged Web 6, preferably made integraltherewith, cylindric bearing surfaces 5a at the opposite ends of theimpression-member, and segmental gears 7 7 arranged at each end of andrigid y secured thereto. Mounted concentrically with the axes of saidbearing surfaces and of the segmental gears are hubs 8, 8 in which aresecured short stub axles or shafts 9, 9 which are provided with rollers10, 10. The stub shafts may be made either integral with the platen orseparately from it.

11, 11 indicate downwardly facing rails carriedon the brackets 3, 3..Said rails hold the impression-member down to its work Withfthe bearingsurfaces 5a, 5EL in contact with bearing rails 12, 12 formed at eachside of the bed 1, and maintain the teeth of the segmental gears incontact with racks 12, 12, formed adjacent said bearing rails (see Figs.4 and 5).

13, 13 indicate socketed lugs formed at each end of the Web 6 fory theattachment of an operating arm or bar 16.

So far the machine is practically as described in the applicationreferred to and forms no part of the present invention.

14, 14 indicate supporting rails secured to the inner faces of thebra-kets 3, 3 in a position parallel to the rails 11, 11 and locatednearer the faces of said brackets than are the rails 11, 11 by adistance equal to a little more than the Width of the rollers 10, 10.Said rails are vertically spaced below the rails 11, 11 a distanceslightly less than the diameters ofthe rollers 10, 10. The upper facesof said railsare curved downwardly at their ends1 as indicated at 15,15, (see-Figs. 1 and 4).

The rollers 10,1are loosely mounted on the stub shafts 9,'-9so astoihave both rotatable and endwise movement thereon. At the forward endsof the brackets 3, 3, are arranged cam plates 17, 17 which, when theimpression member reaches theend-of the path of its travel, are adaptedto engage the,` inner faces of the rollers 10, 10 and with` draw themtoward the brackets 3, 3 away from their contact with the downwardlyfacing tracks 11, 11. This movement brings them into line with the rails14, 14, so that when the impression member is rocked forward to itsinitial position the rollers 10, 10 engage the downwardly curvedportions 15, 15 of the supporting rails 14, 14 and travel backto theirinitial position on the rails 14, 14 (as illustrated in dotted lines inFig. 1). This raises the impression-member from a position of contactwith the type, or the proof sheet snperposed thereon. At the other endof the bracket plates 3, 3 are ar-y ranged cam plates 18, 18 which areadapted, when the impression-member approaches its initial position, toengage the ends of the roller hubs and push them back into their formerposition ready to be engaged by the downwardly facing rails 11, ll--thedownward curves of the rails at 15, 15 permitting the lowering of saidrollers suflicientl for' them to be pushed under the faces o said rails.The vertical distance between the downwardly facing rails 11, 11 and thesupporting rails 14, 14 is just suflicient for the impression-member tobe lifted out of its engagement with the type or the proof sheet and notenough to remove the segmental gears from their active engagement withthe racks 12, 12.

At each side of the forward end of the bed late are provided upstandingangular bufers 19, 19 having projecting curved ends 19a which areadapted, near the end of the movement forward of theiigipression-membcr, to engage pins 23, 23 secured to lugs 20, 2O formedon the outer faces of the segmental gears 7 7, (as indicated in Fig. 6)and hold the ends of the bearing surfaces 5, 5a in cngagementwith thebearing rails 12a, 12a as the impression-member swings on said ends ascenters and after the rollers 10, 10 have passed beyond the limits ofthe rails 11, 11. This prevents the segmental gears from becomingdisengaged from their respective racks and prevents the rack or gearteeth from being broken where the impression member is quickly rocked tothe limit of its movement. To supplement the action of said buffers,lugs 24, 24 are formed at the forward ends of the rails 11, 11 and areadapted to be engaged by elastic disks 22, 22 secured to lugs 2l, 21formed on the faces of the segmental gears 7, 7. Pins 23a, 231 arelocated adjacent said elastic disks in position to engage the under sideof the lugs 24, 24. There are also formed on said segmental gears, lugs30, 30 which engage under. theVA lugs 24, 24, when the impression memberreaches the forward limits of its movement. The pins 23, 23 andsimilarly arranged elastic disks 22, 22a, and curved lugs 30, 30aperform similar functions by engagement with luds 24a, 24fand with theunderside of the rai s 11, 11 and with angular buffers 19b havingprojecting curved arms 19c when the impression member is at the oppositelimit of its movement.

25, 25 indicate elastic buffers secured in any convenient manner to thebrackets, 3 in position to be engaged by the rollers'lO, 10 and receivethe shock of the impressionmember at the end of its forward movement.

While' I have shown'herein certain de,- tails of construction andarrangement it is to be understood that I do not thereby limit myinvention as it is apparent that they may be variously modified withoutdeparting from the spirit of the invention.

I claim as my invention 1. A printing press comprising a horizontaltype-bed, a rocking, cylindric impressionmember, supporting rockers onthe impression-member having curved bearing surfaces concentric with thebearing surface of the impression-member, upwardly facing supportingbearing surfaces formed on the bed and adapted to be engaged by thesupporting rockers, rollers carried by said rockers with their axescoincident with the axes of said rockers, downwardly facing trackssupported on said bed adapted to engage the tops ofsaid rollers in onemovement of said impression-member, upwardly facing tracks located belowsaid downwardly facing tracks and supported from said bed and adapted toengage the rollers in the opposite movement of said impression-member,said upwardly facing tracks bein adapted to lift the impression-memberrom its operative Y level, and means for shifting the relative positionsof said rollers and of said upwardly and downwardly facing tracks.

2 cA printing press comprising a horizontal type-bed, a rocking,cylindric impressionmember, supporting rockers on the impression-memberhaving curved bearing surfaces concentric with the bearing surfaces ofthe impression-member, upwardly facing supporting bearing surfacesformed on the bed and adapted to be engaged by vthe supporting rockers,rollers carried by said rockers with their axes coincident with theaxesof said rockers, downwardly facing tracks supported on said bed adaptedto engage the engage the rollers in the opposite movement of said imression-member, said upwardly facing trac s bein adapted to lift theimpression-memberi; om its operative level, and means fonutomaticallyshifting the relative positions of said rollers and of said upwardly anddownwardly facing tracks.

3. A printing press comprisinga horizontal type-bed, a rockingimpresslon-irember, supporting segmental gears secured to" saidimpression-member, racks mounted on said bed adapted to be engaged bysaid segmental gears, rollers carried by said impressionmember withtheir axes coincident with the axes of said segmental gears, downwardlyfacing tracks supported on said bed adapted to engage the tops of saidrollers in one movement of said impression-member, upwardly facingtracks located below said downwardly facing tracks and supported on saidbed adapted to engage the under side of said rollers in the oppositemovement of said impression-member, said upwardly facing tracks beingadapted to lift the impression-member from its operative level, andmeans for automatically shifting the relative position of said rollersand of said upwardly and downwardly facing tracks.

4. In a printing press comprising a horizontal type-bed, a rockingimpression-member, supporting segmental gears secured to saidimpression-member with their axes coincident with the axes of saidimpressionmember, racks formed on the bed adapted to be engaged by saidsegmental gears, rollers carried by said segmental gears with their axescoincident with the axes of said segmental gears, said rollers havingboth rotative and endwise movement with reference to said segmentalgears, downwardly facing tracks supported on said bed adapted to engagethe tops of said rollers in one movement of said impression member,upwardly facing tracks supported on said bed and adapted to engage theunder sides of said rollers in the opposite movement of said impressionmember, said two pairs of :tracks being arranged in different verticalplanes, and cams supported on said bed at the opposite ends thereofadapted to produce endwise movement of Said rollers to bring them intoengagement with one or the other of said sets of tracks.

5. A printing press comprising a horizontal type-bed, a rockingimpression-member, supporting rockers on the impression-memberhavingbearing surfaces concentric with the bearing surface of the impressionmember, upwardly facing supporting bearing surfaces formed on the bedadapted to be engaged by said supporting rockers, rollers carried bysaid rockers with their axescoincident with the axes of said rockers,downwardly facing tracks supported on said bed adapted to engage thetops of said rollers,

buffers formed at the end of said bed provided with projecting armshaving downwardly facing surfaces, and lugs secured to the faces of saidrockers adaptedto be engaged by the arms of said-buffers at the end ofthe movement of said impression member.

6. A printing press comprising a horizontal type-bed, a rockingimpression member, supporting segmental gears secured to said impressionmember, racks mounted on said bed adapted to be engaged by saidsegmental gears, rollers carried by said impressionmember with theiraxes coincident with the axes of said segmental gears, downwardly facingtracks supported on said bed adapted to engage the tops of said rollers,buffer.,- formed at the end of said bed provided with projecting armshaving downwardly facing surfaces, and pins secured to the faces of saidsegmental gears adapted to be engaged by the arms of said buffers at theend of the A movement of said impression member.

7 .In a printing press comprising a horizontal type-bed, a rockingimpression-member, supporting segmental gears secured to saidimpression-member with their axes coincident with the axes of saidimpressionmember, racks formed on the bed adapted to be engaged by saidsegmental gears, rollers carried by said segmental gears with their axescoincident with the vaxes of said segmental gears, said rollers havingboth rotative and endwise movement with reference to said segmentalgears, downwardly facing tracks supported on said bed adapted to engagethe tops of said rollers in one movement of said impression member,upwardly facing tracks supported on said bed and adapted to engage theunder sides of said rollers in the opposite movement of said impressionmember, said two pairs of tracks being arranged in different verticalplanes, cams supported on said bed at the opposite ends thereof adaptedto produce endwise movement of said rollers to bring them intoengagement with one or the other of said sets of tracks, and means forlimiting the lIgocking movement of said impression mem- 8. In a printingpress comprising a horizontal type-bed, a rocking impression-member,supporting segmental gears secured to said impression-member with theiraxes coincident with the axes of said impressionmember, racks formed onthe bed adapted to be engaged by said segmental gears, rollers carriedby said segmental gears with their axes coincident with the axes of saidsegmental gears, said rollers having both rotative and endwise movementwith reference to said segmental gears, downwardly facing trackssupported on said bed adapted to engage the tops of said rollers in onemovement of said impression-member, upwardly facing tracks supported onsaid bed opposite ends thereof adapted to produce endwise movement ofsaid rollers to bringt-hem into engagement with one or the other of saidsets of tracks, plates secured to the outer faces of said segmentalgears, and lugs supported above said bed adapted to be struck by saidplates at the limit of the rocking movement of said impression-member.

9. A printing press comprising a horizontal type-bed, a rocking,cylindric i111- pressibn-member, supporting rockers on theimpression-member having curved bearing surfaces concentric with thebearing surface of the impressioli-member, upwardly facing supportingbearing surfaces formed on the bed and adapted to be engaged by thesupporting rockers, rollers carried by said rockers, downwardly facingtracks supported on said bed adapted to engage the tops of said rollersin one movement of said impressionmember, upwardly facing tracks locatedbelow said downwardly facing tracks and supported from said bed andadapted to engage the rollers in the opposite movement of said with thebearing surface of the impression-y member, upwardly facing supportingbearing surfaces formed on the bed adapted to be engaged by saidsupporting rockers, downwardly facing tracks supported on said bedadapted to engage the tops of said rollers, and means adapted to retainthe ends of said rockers in engagement with said upwardly facing bearingsurfaces of the bed after said rollers have passed beyond the limits ofsaid downwardly facing rails.

In testimony, that I claim the foregoing as my invention I aflix mysignature in the presence of two witnesses, this 26th day of August A.D. 1909.

ROBERT O. YANDERCOOK. lVitnesses:

G. R. WILKINS, T. H. ALrREns.

